Hasn't the Edelux 2 been stealth upgraded over the years?
I asked SONs customer service the same question a year or two ago, this was their answer:
You are right, recent Edelux II give brighter light compared to
Edelux II we made a few years ago. We are working continuously on
improvements of our products. Not every small change is communicated
publicly.
I asked SONs customer service the same question a year or two ago, this was their answer: